| `label` | [Dynamic String](dynamic-values#dynamic-string) | `null` | Text to show on label. |
| `truncate` | `'start'` or `'middle'` or `'end'` or `off` or `Map` | `off` | The location of the ellipses and where to truncate text from. Leave null to avoid truncating. Use the long-hand `Map` version if specifying a length. |
| `truncate.mode` | `'start'` or `'middle'` or `'end'` or `off` | `off` | The location of the ellipses and where to truncate text from. Leave null to avoid truncating. |
| `truncate.length` | `integer` | `null` | The fixed width (in chars) of the widget. Leave blank to let GTK automatically handle. |
| `truncate.max_length` | `integer` | `null` | The maximum number of characters before truncating. Leave blank to let GTK automatically handle. |